Mishimoto expansion tank top

BMW E36 Aluminum Coolant Expansion Tank R&D, Part 3: Final Prototype and Test Fit

Interested in picking up this aluminum E36 expansion tank? Check out our product page linked below!

BMW E36 Aluminum Coolant Expansion Tank!

The time has come and the anticipation is over. Our final prototype unit has been constructed, and we are ready to check fitment! On to the pictures!

Final Expansion Tank Images

Mishimoto expansion tank prototype
Mishimoto expansion tank prototype
Mishimoto expansion tank prototype
Mishimoto expansion tank prototype
Mishimoto expansion tank prototype
Mishimoto expansion tank prototype

Check out a closer look at the lower coolant hose fitting and our threaded fluid level sensor bung on the base of the tank.

Mishimoto expansion tank prototype fittings
Mishimoto expansion tank prototype fittings

We also stamped our Mishimoto “M” logo into the side of the tank. Although not super visible once installed, this is a nice subtle inclusion to identify this tank as another awesome Mishimoto component.

Mishimoto expansion tank logo
Mishimoto expansion tank logo

Now the cool part! Check out the fill neck and dipstick we have designed for this tank.

Mishimoto expansion tank top
Mishimoto expansion tank top

This part of the tank deserves some extra conversation. The dipstick has a triple function as the mounting peg for the upper tank mount as well as a bleed port for removing air from the cooling system. The end is knurled for easy removal with your fingertips and features an 0-ring for an appropriate seal. Additionally, the threads holding this piece in place feature a V-cut so it can be loosened slightly to bleed out air without completely removing the piece. Pretty awesome! Here is a close-up shot of the bottom of the dipstick.

Mishimoto expansion tank dipstick
Mishimoto expansion tank dipstick

As with the stock tank, this is designed to be checked when the vehicle is cold. It provides an easy-to-use gauge for determining coolant level.

Tank Installation

Time to install this tank and verify fitment! As noted earlier, perfect fitment is a necessity and is always a top requirement when we begin new projects. Here is a look at our tank prototype next to the stock unit.

Mishimoto expansion tank (bottom) and stock expansion tank (top)
Mishimoto expansion tank (bottom) and stock expansion tank (top)

Good news! This expansion tank fits exactly like the stock unit. All hoses mate with our connection points perfectly, and the coolant level sending unit threads on correctly. Check out a few shots of the installed tank!

Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed
Mishimoto expansion tank installed

Discounted Presale!

We hinted at the idea of launching a discounted presale for this tank earlier on in the process. We are still planning to do so, and we hope to launch that next week. Check back soon for details on pricing and our estimated ship date for these expansion tanks.

Thanks for following along with the R&D process!

-John

Interested in picking up this aluminum E36 expansion tank? Check out our product page linked below!

BMW E36 Aluminum Coolant Expansion Tank!

 

4 thoughts on “BMW E36 Aluminum Coolant Expansion Tank R&D, Part 3: Final Prototype and Test Fit”

    1. Thanks for the interest! The expansion tank we are developing is primarily designed for the E36 chassis, however it is also applicable for M52 powered E39 models. We will be launching a discounted pre-sale for this tank next week, the pricing is setup to be $109.95 as an introductory rate. Check out site on Monday for full details!

      Let me know if you have any additional questions!

      Thanks
      -John

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